RE: index rebuild
- From: "Powell, Mark D" <mark.powell@xxxxxxx>
- To: "'oracle-l@xxxxxxxxxxxxx'" <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 18 Mar 2004 12:04:42 -0500
David, what was "determined" based on my reading of the posts is that height
is not a reliable indicator for use in determining when an index needs
rebuilding since size alone can require that the index be in a certain
number of levels.
-- Mark D Powell --
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of thump604@xxxxxxxxxxx
Sent: Thursday, March 18, 2004 11:43 AM
To: oracle-l@xxxxxxxxxxxxx
Subject: index rebuild
There was some recent discusison on here regarding rebuilding indices based
solely on height.
Is this a good criteria to use in determining what indices to rebuild:
height is greater than 4
percentage wasted space on deleted entries compared to active
entries is greater than 20%
percentage of deleted entries compare to active entries is
greater than 20%
Should any other critera be followed and could indices be flagged under this
criteria and still don't necessarily need to be rebuilt.
Thought and opinions please...
Thanks
--
- David
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